GeeMac;
Today is a good day to learn:-)
First of all there's a ton of safety stuff you need to know. I've not gone through and read how proficent you are with industrial electricty, so I have to go with the notion that you are not very knowledgable about it.
One of the thing you'll need to understand , is that house wiring comes in at a near perfect 50Hz or 60Hz and with voltages off 90VAC up to 240VAC depending on your area. Removing a circuit from your central fuse box is supposed to be done by a certified person. NOt doing this can get you into hot water with the mains provider.
Now having said that there are those , myself included , that have the knowledge do this ourselves, I went and got certified by the local power provider and city people including local union IBEW....
The power coming from your solar arrangement can if properly sized , run a segment of one of those circuits, BUT, it may be a good idea to have a licensed person remove one of the circuits and put it in a breakout-box so you can try this out before going any further.
I did this with the little circuit box going to my "little" shed.
I calculated what power I needed , then got everything turned on , on that circuit and actually measured the "real-life " usage , then resized my little battery-bank and inverter before I did the switch.
ONE major thing you'll need to understand!!! If you do this the "test" circuit or any circuit after that MUST not be able to feed power back into the lines of the mains !!! This is done so that if there's a line down and the guy is up on the pole, that your LIVE feed doesn't end his life:-[
Also let the mains power supplier know what you're doing they are a curious bunch and may even have tips for you...
There are people on here that will be able to help you even further than this little tid-bit. PLEASE make sure and read all you can , safety should come first.
Hope this helps
Bruce S